单词：dual plunger sucker rod pump
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As you've probably experienced firsthand, some mosquito species have a real taste for warm, human blood. So much so that if you raise them on it the lab, they'll accept no substitute. Fortunately, I don't get major reactions at all. Brad Main is a mo
2016年Scientific American(九)月
It's a good idea to be as polite as possible even when complaining about something. 1.A: I wish you wouldn't play the TV so loud. B: Sorry. Where you trying to sleep? A: Yes, And while I think of it, please ask when you want to borrow my records. B:
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I, look at the moon I see my crime, Thinking of you I lose my mind. It's something that I'm quite sure it's fine, Read my mind Time, I thought only time can kill the pain, Wash away all my sin remained, God knows how hard I've tried in vain Let it ra
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ROME, Dec. 3 (Xinhua) -- Italy lacks the necessary energy(能量,活力) and strength for an economic revival while unemployment and poverty are on the rise, warned a report issued Friday. The 44th edition of the Censis think tank social survey, the
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In Africa's battle against malaria, two low-tech tacticsinsecticides and bed netshave done a decent job killing off mosquitoes. But it's mainly one species that's been affected. That's a species called Anopheles gambiae, sometimes called the African
2016年Scientific American(八)月
You might not think there would be that many people in the world prepared to devote lifetimes to the study of something so inescapably low key, 你或许会认为，世界上不会有多少人愿意花毕生的心血来研究那个不起眼儿的东西
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